Radiosignaling System



J. H. ROGERS. HADIOSIGNALING SYSTEM. APPL|C`AT10N FILED M'Amzs. 1919.

L316y1588 Patentedsepu 16,1919.r

JAMES H. ROGERS, UF HYATTSVLLE, MARYLF l llOSIG-NAJLING SYSTEM.

intensa.

vapplication tiled March tu,

To all whom it may concern: v

Be it known that l, JAMES ll.. Roenes, a citizen of the United States,residing at Hyattsville, in the county of Prince Georges and State oflt/laryland, have invented new and useful improvements inRjadiosignaling Systems, of which the following is a specification. n

My invention relates to radio slgnaling systems, and particularly tothat type of system-s in which the antenna or radio conductor orconductor for radiating electromagnetic oscillations or receiving thesame,v is located either partly or entirely beneath the surface oftheearth. x l

@ne object of the invention is to utilize more ed'ectively the so-calledsurface waves traversing the earths crust, and the so-called space wavesl propagated through the air or ether above the surface of the earth.

Another object is to eliminate more edectively the strays or staticinterferences which have proved so detrimental in wireless signaling.

ln carrying the invention into ed'ectv ll provide what is commonlycalled a loop, and this is arranged to extend substantially horizontallyor parallel to the surface of the earth, one side of the loop beingburied beneath the surface of the earth and the other side beingdisposed above the surface of the earth.

The invention consists in the novel combination and arrangement ofapparatus and circuits constituting a wireless signaling sys temhereinafter described and claimed and illustrated in the accompanyingdrawings, all for the purpose of transmitting and receiving 'signalsthrough space.

'lhe invention is diagrammatically illustrated in the accompanyingdrawings, in which:

Figure l shows the loopedconductor consisting of uninsulated wire,receiving instruments being associated with the conductor; Fig. la showsa conventional arrangement of sending instruments, which may besubstituted for the receiving instruments for transmitting signals, itbeing understood either the sending or receiving instruments shown inFi'gs.l and l.m are to be used in connection with the arrangement shownin the remaining gures; y

Fig. 2 shows an embodiment of the in- Specicatton of Letters Patent;

Patented sept... ln, linfa...

ioia serial no. maria Vention in which the portion of the radioconductor buried beneath the surface of the earth is insulated therefromand inclosed within a metallic casingg? Fig. 3 shows an embodiment ofthe invention in which both the portion of the radio conductor below thesurface of the earth and the portion above the surface of the earth `areinclosed by a metallic casing;

Figs. 4 and 5 illustrate modifications in which a portion or portions ofthe radio conductor is or are inclosed within another portion orportions of the same.' t

Referring to the drawings, l0 indicates the signal instruments, which inFig. l are those for receiving signals, while in Fig. lathe instrumentsfor sending signals are shown. ln Fig. l, ll is a detector of any type,preferably an audion, l2 a telephone, and 18 and lll the usualcondensers. .Any desired type of instruments and arrangement ofconnecting circuits may be employed. ln Fig. l suitable sendinginstruments are conventionally shown. rl"hese comprise a generator l5,transformer lo, spark gap ll', condenser 18 and key 19.

'llhe above-mentioned instruments are well known in the art of radio ormagnetic wave signaling, and need not be further described.

Referring first' particularly to' Fig. l, the looped radio conductor isshown as an uninsulated wire disposed, one side 20 of the loop, abovethe surface of the earth, and the other side 2l, buried beneath `thesurface of the earth. The surface of the earth is lindicated at 22.

rFhe signal instruments are shown associated with the radio conductor bymeans of an inductive coupling, one side 23 of which constitutes onewinding of the transformer, and 2li the other winding of thetransformer, but may be associated therewith in any other suitablemanner. 'lhe winding 2l is included in the looped radio conductor.

Une side of the loop 2O is supported above the surface of the earth inany suitable manner as by posts 25, upon which insulators 26 areprovided. 'lhe posts 25 are preferably rather short, say ten to twentyfeet, as it is not desirable to have the elevated side of the loo toofar above the surface of the earth. d truss wire 27 may be employed atone end of the loop for securing that end, and a second truss wire 28may be employed at the other end of the loop for ttl llt

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the same purpose. It W-ill therefore be seen that the side 20 of theloop is supported above Ilout insulated from the surface of the earth.

The other side 21 of the loop may be buried beneath the surface of theearth in electrical contact with the earth substantially throughout itslength. It will be observed that both sides of the loop are disposedsu'bstantially horizontally or parallel to the surface of the earth, andthe extent of the loop may be varied in accordance with the requirementsand special conditions under which it is desired to Work. For instancethe loop may be 500 feet, 1000 feet, or 25000 feet, or more, in length.

Instead of having the side of the loop buried beneath the surface of theearth in direct contact with the earth, it may be insulated therefrom asshown in Figs. 2 and 3. In Fig. 2 the side 21 of the loop is showninclosed Within a metalli-c casing 29, which is preferably an ordinaryiron pipe, from Whlch the .radio conductor is insulated by insulation30. In this instance all of the advantages of the action of the metalliccasing inclosing the side of the loop may be obtained, the said casingbeing itself in intimate contact with the earth substantially throughoutits length.

In Fig. 3, a plurality of coils of the looped conductor are shown, thesignaling instrument being associated with one of these coils and theside 21 of the loopy buried beneath the surface of the earth is inclosedW-ithin a metallic casing 29 from which the radio conductors areinsulated, as shown in Fig. 2. In the system here shown, also, the side20 of the loop above the surface of the earth is inclosed Within ametallic casing 31 from which the radio conductor is insulated, asalready described in connection With the side of the loop below thesurface. The metallic casing 31 is supported by posts 25, from which itis insulated 'by means of insulators 32.

'In Fig. 4 the loop is shown as composed of various parts including bothmetallic casings and ordinary Wire conductors. Here the circuit is fromcoil 24 of the inductive coupling, condenser 33, the -metallic casing 31,insulated above the surface of the ground, Wire 34 connecting the otherend of said metallic casing with the adjacent end of the metallic casing29 buried beneath the surface of the ground and in contact therewithsubstantially throughout its length, and Wire 35 Which extends throughmetallic casing 31 but insulated therefrom and then through metalliccasing 29 and return to coil 24. In this instance the entire structureWill oscillate in accordance with the oscillations employed in sendingor receiving signals.

In the modification shown in Fig. 5, the

loop is somewhat similar to that shown in Fig. 4, the circuit being fromcoil 24, condenser 33, conductor 36 passing through metallic casing 31and insulated therefrom, and connected to the adjacent end 37 ofmetallic casing 29, Wire 38 connecting the opposite end of said casing29 with the adjacent end of casing 31, the opposite end of casing 31 andthrough Wire 39 to coil 24.

It Will be understood that it is an intention in the above embodimentsof the invention shown in Figs. 2, 3, 4 and 5, that the side of the loopburied beneath the surface of the. earth should in some instances bc,entirely insulated from the earth, and others that it should include oneconductor within another.

A looped radio conductor arranged as above described, decreases thedisturbances to -Which radio signals are more or less subject, and thisdecrease is more or less according to the combination of Wires andmetallic casings empl-eyed, and the circuits, capacities, andinductances used at the point of receiving. The strays may be almosteutirely balanced, out by the proper arrangements off values of theabove mentioned circuits, capacities and inductances.

In accordance With the patent statutes I have described what I nowbelieve to be the best embodiment of the inv tion, but I do not wish tobe understood t ereby as limit` ing myself or the scope of theinvention, as many changes and modifications may be made Withoutdeparting from the spirit of the invention and all such I aim to includein the scope of the appended claims.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

1. A radio signaling system comprising a looped radio conductorcontaining a plurality of turns of radio conductor extendingsubstantially parallel to and having one si de of the loop buriedbeneath the surface of the earth, and radio signal instrumentsassociated with said conductor.

2. A radio signaling system comprising an elongated looped radioconductor, the sides of the loop extending substantially parallel to thesurface of the earth, one side of the loop being buried beneath thesurface. of the earth but insulated from lthe earth substantiallythroughout its length, the other 'side of the loop being supported abovethe surface of the earth, and signal instruments associated with saidconductor.

3. A radio signaling system comprising an elongated looped radioconductor, the sides of the loop extending substantially parallel to thesurface of the earth, one side of the loop being buried beneath thesurface of the earth, a metallic covering inclosing said buried side ofthe loop throughout vits length but insulated therefrom, the other sideof said loop being supface of the earth, a metallic covering inclosingsaid buried side of the loop throughout its length but insulatedtherefrom, the other side of said loop being supported above the surfaceof the earth, and a metallic casing iuclosing said last ymentioned sideof the loop throughout its length but insulated therefrom and from theearth, and signal instruments associated with said conductors.

5. A radio signaling system comprising 'an elongated looped radioconductor, the

sides of the loop extending substantially parallel to the surface of theearth, one side of the loop being buried beneath the surface of theearth, but insulated therefrom, the other side of said loopbeingsupported above the surface of the earth, and a metallic casinginclosing said last mentioned side of the loop throughout its length butinsulated therefrom and from the earth, and signal instrumentsassociated with said conductors. v

6. 'A radio signaling system comprising an elongated looped conductorWhich includes Within the loop one conductor passing through andinclosedWithin but insulated from the other conductor, and signal instrumentsassociated with said conductor.

7, A radio signaling system comprising an elongated looped radloconductor containing a plurality of turns, one side of the loopextending substantially parallel to and having one side of the loopburied beneath the surface of the earth, the other side of the loopbeing supported above the surface of the earth, each side of the loopconsisting of a metallic casing and a length of the radio conductordisposed therein but insulated therefrom. l

In testimony whereof I have hereunto set I my hand. f

JAMES H. ROGERS.

